Adipose levels of dioxins and risk of breast cancer
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Objective: Our objective was to evaluate the breast cancer risk associated with body burden levels of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs).
Methods: We conducted a hospital-based case-control study among 79 women diagnosed with invasive breast cancer and 52 controls diagnosed with benign breast conditions. We collected breast adipose tissue and analyzed it for all 17 2,3,7,8-substitituted PCDD/PCDFs. We used unconditional logistic regression to calculate age- and race-adjusted exposure-specific odds ratios (ORs) and 95% confidence intervals (CI) for each individual PCDD/PCDF congener as well as for the summary measures (I-TEQ, Adj-TEQ).
Results: Dioxin levels were consistent with reports from other small, contemporary studies of body burdens in the U.S. None of the odds ratios for any of the congeners or summary measures differed significantly from one. Especially for the PCDF congeners, point estimates tended to be below one. One notable exception was octachlorodibenzo-p-dioxin (OCDD), for which the odds ratio for the second and third tertiles appeared modestly elevated (OR = 1.22, 95% CI: 0.47:3.16 and OR = 1.62, 95% CI: 0.64:4.12, respectively), though the test for trend was not significant (p = 0.36).
Conclusion: Breast cancer risk was not associated with adipose levels of PCDD/PCDFs. More study is suggested among women of color who may have higher body burden levels of these compounds.
- Adipose levels of dioxins and risk of breast cancer
Cancer Causes & Control
Volume 16, Issue 5 , pp 525-535
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- Online ISSN
- Kluwer Academic Publishers
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- breast neoplasms
- adipose tissue
- body burden
- case-control studies
- Industry Sectors
- Author Affiliations
- 1. California Department of Health Services, Environmental Health Investigations Branch, 1515 Clay Street, Suite 1700, Oakland, CA, 94612, USA
- 2. Public Health Institute, 1515 Clay Street, Suite 1700, Oakland, CA, 94612, USA
- 3. California Department of Toxic Substances Control, Hazardous Materials Laboratory, 700 Heinz Avenue, Suite 100, Berkeley, CA, 94710, USA
- 4. Stanford University School of Medicine, MSLS Building, Room P214, 1201 Welch Road M/C 5494, Stanford, CA, 94305–5494, USA